I need some fresh start on building better sound quality tracks.
Been some time after last production and while trying now some new approaches, my ears are lost.
There's a lot of Youtube and other articles to read, hear, watch and
I'd also like some experiences from you, professionals.

I don't have any special studio area, just my monitors in my room.
If I have mastering tool in Cubase, like Ozone, should I use just that one, or is it smart to combine with Scope or using just Scope ones?
While using just Cubase tools also give me option to Export Audio whole track, which I can't with combination with Scope.
Last track I produced, few days ago, while producing and listening in normal lower volume, sounds nice and fine.
Then I turned volume up, sounds like shit.
I know , learning and practice, but at some point my ears doesn't trust so much like before and that was just while I was trying to improve sound, now I'm stucked with , what's real and what not.
With my studio monitor headphones was the same. Listening lower volume, sounds nice, listening loud, sounds like a trash

I was layering and trying to polish sound, cutting away drum and bass for more space and so on ....
I did quite nice punch tracks already, but now i was focused more on mid area, which I think i'm still weak.